> parallel to USB Last time I looked at the spec for those, it supported send-byte-to-printer-with-IEEE-1284-handshaking as a primitive (the USB interface saw

> parallel to USB Last time I looked at the spec for those, it supported send-byte-to-printer-with-IEEE-1284-handshaking as a primitive (the USB interface saw data bytes, not instructions to set, clear, and read control lines). The parallel ports that attached to ISA (or inside PCI multi-I/O chips) connect each pin to a bit of an I/O address in compatibility mode[], which connect-a-chip-to-parallel-port hacks tend to use. [] https://en.wikipedia.org/wiki/Parallel_port#Pinouts https://en.wikipedia.org/wiki/Parallel_port#Pinouts